Reflect and research When was calculus first discovered, and by whom? What is an example of a physical quantity that is given by a derivative (other than speed or acceleration)? What is a case when yo...Reflect and research When was calculus first discovered, and by whom? What is an example of a physical quantity that is given by a derivative (other than speed or acceleration)? What is a case when you would need to perform an integral to evaluate a physical quantity?